Oil-pump.



J. B. DAVIS.

OIL PUMP.

APPLIOATIQH FILED APR. 6.

Patented Aug. 15, 1911.

2 BHBETS8HEET 1.

J. B. DAVIS.

OIL PUMP. APPLICATION nun APR. 6, 1911.

1,000,965, Patented Aug. 15, 1911.

2 BHEETFBIBIZT F 9 5; 55 "A"? 1 r1431 225 37 4 I I .25 ingdractionalquantities of oil.

UNITED sTATss ATENT OFFICE.

Joli-IN: B. DAVIS, F DAYTON, OHIO, ASSIGNOR "0 THE AMERICAN OIL PUMP ANDTANK COMPANY, OF DAYTON, OHIO, CORPORATION OF OHIO.

- Specification of Letters Patent.

Patented Aug. 15, 1911 Application filed April 6, 1911. SeriaI No.619,236.

will enable others skilled in the art to which it appertains to make anduse the same,

reference being had to the accompanying drawings, and t0. the lettersand figures of reference marked thereon, which form a part ofthisspecification.

This invention relates to new and useful improvements in self-measuringoilpumps.

The objects of the invention are, to pro-' of oil delivered by the pump,to provide an improved form of supplemental counter which indicates theamount of oil that may ib'e delivered to a single container, and toprovide an improved form of stop for limltiiigfithe action of the pumpwhen dischargn the various municipalities throughout the' country, thelaws relating to weights and measures provide for a sealer whose dutiesare to inspect measuring devices as well as scales, and if found to becorrect, to place their stamp or seal upon them. In

the case of self-measuring oil pumps, the indicating stops which controlthe discharge 3. of the various quantities of oil are scaled after beingadjusted to the proper positions. Heretofore it has been necessary toplace a seal on each individual stop, owing to stops being controlled,in their locked positions,- by individual means such as set screws. The

resent invention obviates this and renders it possible to employ asingle seal for all the stops, as will hereinafter more fully appear.

Referring to the accompanying drawings,

Figure 1 is a front elevation of a self mcasurmg oil pump with myimprovements applied thereto, the same being partially in jsection; Fig.2 is a side elevation of the same partially in section; Fign3 is a frontelevation of the total counter; Fig. 4 is a top plan view oi the same;Fig. 5 is a section on the line a a of Fig. 2 and b b of Fig. 6, showinga detail View of the su )plemental of Fig. 5, Fig. 7 is a detail View ofthe stop mechanism for limiting the movement of the pump when dispensingfractional quan- 'tities; and Fig. 8 is a section on the line (l d i ofFig. 7.'

Throughout the specification and draw ings, similar reference charactersindicate corresponding parts.

Referring more particularly to the drawings, 1 represents a cylindermounted upon a lower chambered member 2 supported upon a base orpedestal 3.- Mounted upon the upper end of the saidcylinder is an up-'per chambered member 4: which is provided with an outlet orifice 5. andwhich is connected with the lower chambered member 2 by side tubes 6.The lower chambered member is provided with a suction inlet 7 andmounted within the chambers of the upper and lower members 2 and 4 arevalves 8 which control the liquid passing therethrough. The liquid ispumped through the cylinder 1, members 2 and 4, and tubes 6 by a piston9 mounted within the cylinder 1. and attached to the lower end of apiston rod 10. The piston rod 10 extends 7 upwardly through the uppermember ,1 and a gland 11, and on its upper end it is provided with arack 12 guided by the upper I In mesh withvthe rack 12 isa/pinio'n 14mounted on a shaft 15 journaled in the frame 13, Fig. 1. Also mounted onthe shaft15 is a gear 1 6 m mesh with a pinion 17 driven by a crank 18having bearings in the frame 13. hen the crank 18 is oscillated, the.piston 9 is reciprocated, and the oil or other liquid is drawn inthrough the inlet 7 and discharged through the outlet 5. It iscontemplated that the internal diameter of the cylinder 1 and the strokeof the piston is such that each upward and downward movement ofthepi'ston will discharge a definite quantity of oil from the pump;

for example." one gallon. In the construction shown in the drawings, thestroke of the piston is such, that the amount of liquid discharged frombelow the piston willbe suflicient to compensate forthe shortage of thatdischarged from above the piston. due

to the displacement by the piston rod. to

secure the full discharge of the definite quantity by both strokes.

counter Fig. 6 is a section on't e line 0 c The above describedmechanism consticounter consisting of wheels 21 progresarrangement ofthe ratchet sively actuated by transfer wheels 22. The wheels 21 and 22are pivot-ally mounted on a frame 23, and the unit wheel 21 is providedwith a gear 24 in mesh with a worm gear 25. The worm 25 is mounted on ashaft 26 which carries a gear 27 in mesh with a gear 28 which is in turnin mesh with a ear 29. The gears 28 and 29 are mounted on a plate 30attached to the frame 13 and the gear 29 carries a ratchet wheel 31engaged by a spring-controlled pawl 32 carried by an arm 33. The arm 33is mounted on a stub shaft 34 attached to the shaft 15 on which thepinion 14 is mounted. The and gearing is such, that upon eachoscillation of the crank 18, rack 12 and shaft 15, the unit wheel 21will be rotated one tenth of a revolution, thereby registering thenumber of definite quantities of oil discharged from the pump. Thewheels 21 are provided with numerals which may be read through a sightopening in a plate 19, and which are separated by intervening lines ordashes. The

number of gallons of oil may therefore be read directly from thecounter, and the fractional quantities estimated from the po sition ofthe intermediate dashes.

A counter thus constructed is simple in construction and efficient inoperation, and as the action is positive, the possibility of errors isentirely eliminated.

To ascertain the amount of oil that may be discharged into a singlecontainer, a supplemental counter that may be easily reset to zero isprovided as follows. the frame 13 is a circular housing 35 provided witha pin 36 on which a counting wheel 37 may rotate. The wheel 37 isprovided with a flange 38 having numerical characters which may beviewed through a sight opening 39 in the housing 35. The

wheel 37 is also provided with a marginal flange 40 by means of whichsaid cou'nt-ing I wheel may be manually rotated in either direction toreset to zero. The central portion of the wheel 37 is provided with aratchet 41 adapted to be engaged by a pawl 42 mounted on an arm 43pivoted on the pin 36. The arm 43 extends out through an opening 44 inthe housing 35, and the shape of the pawl 42 is such, that when the arm43 is in a normal position, said pawl will engage the edge of thehousing 35, thereby elevating the" pawl 42 and allowing the countingwheel37 to be freely and manually tion of the crank, the

' into the path of Mounted on rotated in either direction. The outer endof the arm 43 is provided with a resilient portion 46, such as a closedcoil spring which is in a position to be engaged by a pin 45 on the rack12 when said rack is reciprocated. The movement of the arm 43 is limitedby the opening 44, and an extended movement of the rack 12 will becompensated for by the arm, which prevents the arm 43 acting as a stopfor the rack and thus prevents strains being thrown on the counter. Itwill be seen that the supplemental counter is simple in construction andmay be easily set to zero, as the counting wheel may be rotated ineither direction. This is due to the fact that the actuating pawl isfree from the ratchet when the various members are in a normal position.

To limit the upward movement of the rack 12 to various predetermineddistances,

resilient portion 46 ofthe thereby allowing the pump, to dischargefractional quantities of oil at each oscillaprovided. Mounted in theframe 13 and lying parallel with the rack 12, is a rod 50 proxilidedwith threads preferably of small pitc with threads agreeing with thethreads of the rod, is a plurality of stop members 51 adapted to berotated thereon within sub stantially a circle. The rack 12 is proyidedat its lower end with a lateral )rojection 52 adaptedto engage any oneothe stop members 51 when said stop member is swung to a position in thepath of said projection. Each stop member 51 represents a definitequantity or fractional quantity of oil such as gallon, half gallon,quart and pint, and are arranged upon the rod 50 according to theirvalue. When the stop member 51 representing a quart, is swung theprojection 52, the movement of the rack 12 Wlll be limited to one fourththat when the pump is discharging its full capacity orone gallon. Theparticular construct-ion of the stop members 51 is such that space isprovided in which to indicate the quantity of oil pumped when aparticular stop arrests any further movement of the piston. The ositionof the stop members 51 may be ad uSt'ed by rotate ing said members onthe rod 50, and after they are set they are locked in their adjustedposition by a rod 53 mounted in the Mounted on the rod 50 and providedfollowing means areframe 13 parallel with the rod 50 and adjacentthereto. tion b a screw 54 over which a place by the proper oflicial.The placing of the seal of the oflicial sealer of weights;

53 will requlre a breakin of this seal and a. consequent violation 0 theThe rod 53 is held in 'pos1- seal may be law by the continued operationof the pump after such breaking of the seal. As the upper member 51represents the full discharging capacity of the pump, and in no case isit necessary to swing or rotate the same out of the path of theprojection 52, said upper stop member 51 is provided with an extension55 which engages the rod 53 and prevents possible rotation of the uppermember 51 after it has once been adjusted. As this upper member 51 cannever be swung out of the path of the projection 52, the pump can neverdischarge more than the maximum vpredetermined quantity of oil. A stopde vice thus constructed will allow a maximum number of stop members tobe used, as each member is actuated independently; and as the screwthreads are of fine pitch, the adjustment may be made very accurate. Itwill also be noted that the threads prevent the possible displacement ofthe stop members on the rod 50 from the continuous tapping of theprojection 52.

Having described my invention, I claim:

1. In a device of the type specified, the

"combination with a casing of a reciprocatin member, a counting wheelrotatable in eit er direction, and provided with a ratchet, an armadapted to be actuated by said reciprocating member, a pawl mounted onsaid arm, said pawl being constructed and arranged to engage an adjacentportion of the casing when said arm is lowered, thereby freeing it fromengagement-with said ratchet 2. In a device of the type specified, thecombination ofa reciprocating member, a counting wheel provided with aratchet, an arm adapted to be engaged by said reciprocating member, apawl on said arm adapted to engage said ratchet and to rotate saidcounting Wheel when said arm is actuated by said reciprocating member,said arm having a resilient portion whereby when the counter is fullyactuated an extended move ment of the reciprocating member will notbecommunicated to said wheel.

3. In a device of the type specified, the combination of a reciprocatingmember, a threaded .rod parallel with said reciprocating member, arotatable indicating stop on said threaded rod adapted to be swung intoa position to be engaged by said reciprocating member, and to limit themovement of sald reciprocating member, and means for preventing acomplete rotation of said reciprocating member on said threaded rod.

4. In a device of the type specified, the

combination with a reciprocating member,

of a threaded rod parallel with said memher, a plurality of swingingstops mounted on said rod, each of which is adapted to be swung into aposition to be engaged by said reciprocating member and out of suchposition, and means for preventing a complete;

reciprocating member, a plurality of swinging stops mounted on said barand adapted to be swung into a position to engage said reciprocatingmember to limit the movement of the same, and a rod lying parallel withand adjacent to said threaded member and adapted to prevent a completerotation of said stops.

6. In a self-measuring oil pump, the combination of a cylinder, upperand lower chambered members communicating with said cylinder, exteriorvalve-controlled pipes providing passages between said upper and lowerchambers, a piston within said cylinder having an upwardly extendedextended rod, a counting wheel for registering the number ofreciprocations of said rack, an arm having a resilient portion, a pawlon said arm adapted to engage and rod, a reciprocating rack secured tosaid 5 actuate said counting wheel, and a pin on said 'raekadaptedto'engage said resilient portion of said arm.

7. In a self-measuring oil pump, the combination of a cylinder, upperand lower chambered members communicating with 5 said cylinder, exteriorvalve-controlled pipes providing passages between said upper and lowerchambers, a piston within said cylinder having an extended rod, areciprocating rack on said rod, said rack having a stop extensionthereon, driving means engaging said rack, a screw-threaded rod .mountedparallel with said rack. a series of indicating stops on saidscrew-threaded rod adapted to be individually moved out of and intoengaging positions with the stop on said rack, and a parallel ro'dadjacent to said screw-threaded rod and. controlling the movement ofsaid stops on said screw-threaded rod.

In. testimony whereof I aflix my signature, in presence of twowitnesses.

JOHN B. DAVIS. Witnesses:

R. J. MoCAn'rY, HowARo S. SMITH.

